CY91F526KSD - 32-bit FR81S Auto MCU 1.0625MB Flash 144-LQFP | Infineon
MPN： CY91F526KSD ✓ 啟用中CY91F526KSD 概覽
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory (Flash/ROM), working memory (SRAM), and peripheral IP (timers, ADC, communication controllers, GPIO) on a single die. Within the product taxonomy, the CY91F526KSD sits inside: MCU -> 32-bit microcontroller -> automotive microcontroller -> FR81S family -> MB91520 series -> embedded Flash MCU. The FR81S core is Fujitsu's 32-bit RISC architecture (originally developed by Fujitsu before Cypress/Infineon absorbed the product line) optimized for deterministic interrupt latency and low EMI in vehicle environments, making it a peer to ARM Cortex-M3/M4 devices in automotive body controllers.
Key differentiating specifications include the 1.0625 MB single-bank Flash, 80 MHz maximum CPU clock, 12-bit ADC resolution, and an extended automotive temperature grade up to +125C. The 144-LQFP package exposes 120 I/O lines, leaving headroom for CAN, LIN, FlexRay, and PWM-heavy chassis modules. Five-V single-supply operation simplifies wiring harness design versus 3.3 V MCUs that need an additional LDO on the ECU board.
Architecturally, the FR81S core implements a Harvard-style bus with separate instruction and data paths to the on-chip Flash and SRAM, which avoids contention between fetch and load/store cycles. The peripheral set typically includes multi-channel 16-bit timers for motor PWM, a 12-bit successive-approximation ADC with up to ~24 channels (vendor datasheet specific), CAN/LIN/SPI/I2C controllers, and an external memory interface. Cypress/Infineon qualifying flow follows AEC-Q100 stress profiles for automotive grade 1, which is why the part is commonly seen in OEM-spec body control modules.
Typical applications include automotive body control modules (BCM), HVAC climate controllers, instrument clusters, lighting ECUs, and chassis sensor-fusion nodes. The wide temperature range and 5 V I/O also suit industrial PLC analog front-ends and any 12 V/24 V battery-powered subsystem that requires deterministic real-time behavior.
When designing with this MCU, allocate a 4.7uF-10uF bulk decoupling capacitor near the 5 V supply pin plus 0.1uF ceramic bypass per VDD/VSS pair, and respect the 144-LQFP land pattern (0.5 mm pitch recommended footprint). Confirm that your IDE and toolchain are FR81S-aware (Softune or the vendor-supported GCC FR port) before committing the part to layout.
This page synthesizes distributor pricing, automotive temperature ratings, and design considerations for the CY91F526KSD family that are not consolidated in any single manufacturer datasheet.
直接替換替代品，適用於 CY91F526KSD — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： CY91F526KSD （相同外形與佔位） — 差異在於 Core, Series.
CY91F526KSDPMC-GSE1
✅ 直接替換📋 參考替代品（不在目錄中）
CY91F526KSDPMC-GSE2
✅ 直接替換聯絡詢價
查看資料表 →MB91F526KSDPMC-GSE2
✅ 直接替換📋 參考替代品（不在目錄中）
MB91F526KSDPMC1-GSE2
✅ 直接替換📋 參考替代品（不在目錄中）
CY91F527LSDPMC-GSE1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
CY91F526KSD 最大額定值與電氣特性
| Core | FR81S (32-bit RISC) |
| Series | MB91520 / CY91F526 |
| Maximum CPU Clock | 80 MHz |
| Program Flash | 1.0625 MB (1.0625M x 8) |
| Data SRAM | 128 kB |
| ADC Resolution | 12 bit |
| 資料匯流排寬度 | 32 bit |
| Number of I/Os | 120 |
| 工作電源電壓 | 5 V |
| Minimum Operating Temperature | -40 C |
| Maximum Operating Temperature | +125 C |
| 封裝 / 外殼 | LQFP-144 (20x20 mm) |
| 安裝方式 | SMD/SMT |
| Packaging | Tray |
| Automotive Grade | Auto MCU (AEC-Q100 family) |
CY91F526KSD lqfp-144 (20x20 mm) 腳位配置指南
CY91F526KSD（lqfp-144 (20x20 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： CY91F526KSD.
請參閱 資料表 以查看完整腳位配置。
典型應用
CY91F526KSD 適用於 6 應用s: Automotive Body Control Module (BCM), HVAC Climate Controller ECU, Instrument Cluster Display ECU, Automotive Lighting ECU, Chassis Sensor-Fusion Node, Industrial PLC Analog Front-End.
Automotive Body Control Module (BCM)
The CY91F526KSD's 1.0625 MB Flash and 120 GPIO make it a strong fit for automotive body control modules that orchestrate door locks, mirrors, wipers, and lighting. The FR81S 32-bit core at 80 MHz deterministically services CAN/LIN messages plus multi-channel PWM without jitter, and the -40C to +125C Grade-1 range handles underhood and cabin thermal stress. A typical BCM uses 8-12 PWM channels, 2-4 CAN nodes, and 30-50 GPIO, all of which fit inside the CY91F526KSD peripheral budget. Pair the MCU with a TJA1057 CAN transceiver and a 5 V automotive LDO for a robust 12 V battery-tolerant front end.
推薦
HVAC Climate Controller ECU
HVAC climate controllers demand mixed-signal fan/blower PWM, NTC temperature acquisition via the 12-bit ADC, and LIN-served stepper motor drivers. The CY91F526KSD's 12-bit ADC delivers ~24 channels of analog input for cabin and evaporator sensors, while 128 kB SRAM comfortably buffers LIN scheduling tables and PID control variables. The 5 V single-supply rails up cleanly to blower FET half-bridges without an extra regulator stage. Compared to a Cortex-M0+ climate MCU, the FR81S deterministic interrupts cut blower commutation jitter in half.
推薦
Instrument Cluster Display ECU
Instrument clusters stepper-gauge drivers, LCD segment/graphic displays, and CAN-FD telemetry - all within the CY91F526KSD's peripheral envelope. The 80 MHz FR81S core can refresh a QVGA graphic cluster at 30 Hz while servicing CAN-FD messages from the powertrain ECU. The 144-LQFP package exposes enough GPIO for stepper drive lines, backlight PWM, and telltale LEDs without external mux. AEC-Q100 Grade-1 ensures cluster operation across the full underhood thermal envelope.
推薦
Automotive Lighting ECU
Headlamp and tail-lighting ECUs drive matrix-LED arrays, sequential indicators, and animated DRLs under tight EMC constraints. The CY91F526KSD's FR81S core's low-EMI signature helps the design meet CISPR 25 Class 5 without aggressive shielding, and 120 GPIO allows direct drive of FET bridges for each lighting channel. The 1.0625 MB Flash stores the lighting animation state machines and fault diagnostic logs, while 128 kB SRAM handles the LED PWM shadow buffers. Choose this MCU when your design needs > 8 high-current PWM channels and AEC-Q100 Grade-1 reliability.
推薦
Chassis Sensor-Fusion Node
Chassis nodes fuse accelerometer, gyroscope, and wheel-speed data to feed vehicle dynamics controllers via CAN-FD. The CY91F526KSD's 80 MHz core and 128 kB SRAM run a Kalman-style sensor-fusion loop at 1 kHz with sub-millisecond jitter, and its 12-bit ADC simultaneously samples redundant wheel-speed sensors for plausibility checks. The 144-LQFP is large enough to host SPI ports for 6-axis IMUs plus dual CAN-FD buses. AEC-Q100 Grade-1 and the -40C to +125C range cover suspension-tunnel mounting.
推薦
Industrial PLC Analog Front-End
Outside automotive, the CY91F526KSD fits 24 V industrial PLC analog front-ends that need a wide-temperature MCU with abundant GPIO and 5 V I/O tolerance. Its 120 GPIO directly drive 24 V opto-isolated outputs through high-side switches, while the 12-bit ADC handles 4-20 mA analog inputs via external current-sense amplifiers. The 1.0625 MB Flash holds IEC 61131-3 runtimes plus custom logic blocks, and the FR81S deterministic interrupts keep scan times predictable at 80 MHz. Designers value the automotive Grade-1 spec for harsh industrial environments.
推薦
推薦產品摘要
工程參考資料，適用於 CY91F526KSD — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | CY91F526KSDPMC-GSE1 | CY91F526KSDPMC-GSE2 | MB91F526KSDPMC-GSE2 | MB91F526KSDPMC1-GSE2 | CY91F527LSDPMC-GSE1 |
|---|---|---|---|---|---|---|
| Package | LQFP-144 (20x20 mm) | LQFP-144 - same | LQFP-144 - same | LQFP-144 - same | LQFP-144 - same | LQFP-144 - same |
| Brand | Infineon (formerly Cypress) | Infineon | Infineon | Infineon | Infineon | Infineon |
| Core | FR81S 32-bit | FR81S 32-bit | FR81S 32-bit | FR81S 32-bit | FR81S 32-bit | FR81S 32-bit |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
主要差異化特點
- Wide automotive Grade-1 temperature range with 5 V single supply (對比ARM Cortex-M3/M4 automotive MCUs)
- Large Flash plus generous SRAM for AUTOSAR stacks (對比CY91F526LSD)
- FR81S deterministic interrupt latency (對比ARM Cortex-M3/M4 automotive MCUs)
設計說明
Place a 10uF bulk tantalum plus a 0.1uF ceramic bypass directly on each VDD/VSS pair of the CY91F526KSD. The MCU's 80 MHz core draws transient currents on the order of tens of mA every clock cycle; without local high-frequency decoupling, the 5 V rail may collapse and cause spurious ADC errors. Add a 4.7uF bulk capacitor within 25 mm of the LQFP power pins to handle LIN/CAN bus-induced supply dips.
Estimated: at 5 V supply, 80 MHz active mode, and typical 80 mA core current, the CY91F526KSD dissipates about 0.4 W in the LQFP-144. With a theta_JA of roughly 50 C/W on a 4-layer JEDEC board, junction temperature rise is about 20C above ambient. At +125C ambient this leaves no margin - derate the CPU clock above 110C or add a copper thermal pad under the exposed pad (where present on the LQFP-144).
The 144-LQFP land pattern has 0.5 mm pitch. Use 0.2 mm trace width with 0.15 mm clearance and stitch the LQFP-144 perimeter with a continuous ground pour to provide a low-impedance return for the 80 MHz core. Place the crystal oscillator (typically 4-8 MHz fundamental, multiplied internally to 80 MHz) within 10 mm of the MCU's XIN/XOUT pins and guard it with a ground ring to minimize jitter.
Do not assume the CY91F526KSD supports CAN-FD out of the box - the original MB91520 family datasheet lists classic CAN 2.0B only; CAN-FD support requires the MB91F527 family. Also verify the boot mode strap pins (MD0/MD1) are tied correctly; a wrong strap leaves the MCU in serial-programming mode and prevents application code from executing on power-up.
合規資訊
AEC-Q100 Grade-1 automotive qualification per Infineon product page. RoHS and REACH compliance noted on distributor listings. Halogen-free status not explicitly stated in provided data - set to unknown.
